High Power DC Step-down Power Module 12V To 9V 3.7V LCD Digital Display LED Constant Current Board

Product parameters: Input voltage: DC5.3-32V (minimum input of 4V to achieve step-down, but when the input is lower than 5.3V, the voltage and current measurement is not accurate, the input needs to be DC) Output voltage: DC1.2-32V (The input voltage must be higher than the output voltage, the minimum differential voltage is 0.8V) Output current: can work stably at 8A for a long time, and can reach 12A under enhanced heat dissipation Output power: natural heat dissipation 120W (within 8A) enhanced heat dissipation 160W Voltage display: resolution 0.05V, range 0-32V Current display: resolution 0.01A, range 0-12A Conversion efficiency: about 96% Working current: about 25mA Soft start: Yes (large power with load module may fail when starting) Input reverse connection protection: Yes Output anti-backflow: no (if charging the battery, first power on the module and then connect the battery, and ensure that the battery voltage is lower than the output voltage; if there are conditions, please connect the anti-backflow diode in the output positive pole) Short circuit protection: Yes Size: length * width * height 82 * 52 * 32mm Weight: 80g Note: 1. The factory default output voltage and current of the module is about 18V/7A. Because the module is a buck module, you need to lower the output voltage below the input voltage to work. If you find that the output voltage cannot be adjusted after receiving the module, please First turn the CV voltage counterclockwise counterclockwise to adjust the potentiometer for more than 20 turns, and then use the module to adjust the voltage normally; 2. Directly short-circuit the output to adjust the current value, which will cause a large spark to cause danger. It is recommended to lower the output voltage to below 10V before shorting the output terminal, and the CC current potentiometer rotates 10 times or more to the bottom counterclockwise. Then short the output, turn the CC potentiometer clockwise to slowly increase to the desired current value. Highlights: 1. Crystal case, beautiful design, good touch and touch texture; 2. Press the button to control the output to turn off, and you can set the power-on default to ON or OFF; 3. LCD can display input and output voltage, output current output power; 4. Input end anti-reverse protection, reverse connection will not burn; 5. High efficiency over 95% high current, low heat, output voltage 1.2-32V can be adjusted freely, constant current value 0-12A can be adjusted, suitable for high-power LED constant current drive, lithium battery battery charging, etc.. Function Description: 1. The module has IN/OUT, ON/OFF two buttons: IN/OUT button switches input voltage and output voltage display, long press can switch output current output power display; ON/OFF button control output is ON or OFF, long press can Set the default output status of the next power-on to be ON or OFF. 2. CC sets the potentiometer for the current. It rotates clockwise to increase the set current. When the load current reaches the set current, it enters the constant current state, the CC constant current indicator (red) lights up; the right CV is the voltage setting. The potentiometer rotates clockwise to increase the output voltage. The OUT indicator is an output status indicator that lights up when there is voltage at the output, otherwise it is off. Instructions: 1. Use as a normal buck module with overcurrent protection (1) Adjust the CV constant voltage device so that the output voltage reaches the voltage you want. (2) Firstly rotate the CC current adjustment potentiometer counterclockwise for more than 10 turns, then use the multimeter 10A or 20A current file to measure the output short-circuit current (directly connect the two test leads to the output terminal) adjust the CC constant current potential clockwise. The output current reaches the overcurrent protection value you want to set. (For example, if the current value displayed by the multimeter is 2A, then the maximum current can only be 2A when you use the module, and the red constant current indicator will be on when the current reaches 2A, otherwise the indicator will be off) 2. Use as a battery charger Modules without constant current function cannot be used to charge the battery. Because the voltage difference between the battery and the charger that consumes electricity is too large, the charging current is too large, causing damage to the battery. Therefore, the battery should be used at the beginning. Stream charging, automatically switch back to constant voltage charging when charging to a certain extent. (1) Determine the float voltage and charge current of the rechargeable battery you need; (If the lithium battery parameter is 3.7V/2200mAh, then the float voltage is 4.2V, and the maximum charge current is 1C, which is 2200mA) (2) Under no-load conditions, the multimeter measures the output voltage, and adjusts the constant voltage positioner to make the output voltage reach the float voltage; (If charging the 3.7V lithium battery, adjust the output voltage to 4.2V) (3) Firstly rotate the CC current adjustment potentiometer counterclockwise for more than 10 turns, then use the multimeter 10A or 20A current file to measure the output short-circuit current (directly connect the two test leads to the output terminal) adjust the CC constant current potential clockwise. The device causes the output current to reach a predetermined charging current value; (4) Connect the battery and charge it. (Steps 1, 2, and 3 are: input terminal is connected to the power supply, and the output terminal is not connected to the battery at no load) 3. As a high power LED constant current drive module (1) Determine the operating current and maximum operating voltage at which you need to drive the LEDs; (2) Under no-load conditions, the multimeter measures the output voltage, and adjusts the constant voltage position device to make the output voltage reach the maximum working voltage of the LED; (3) Firstly rotate the CC current adjustment potentiometer counterclockwise for more than 10 turns, then use the multimeter 10A or 20A current file to measure the output short-circuit current (directly connect the two test leads to the output terminal) adjust the CC constant current potential clockwise. The device causes the output current to reach a predetermined LED operating current; (4) Connect the LED and test the machine. (Steps 1, 2, and 3 are: input is connected to the power supply, and the output is not connected to the LED light.) Package included: 1 x High Power DC Step-down Power Module With Case